Carbureter.



c. B, KENT.

CAREURETER. AP LICATION FILED MAR.Z3, I914.

Patented May 25, 1915.

1 INVENTOR.

a B Ob 1&0 @M

A TTORNEYS.

UNITED snares m orrron.

T all whom it mag concern: P

Be it known that I, (J-nannies B. KENT, a citizen of the United States, and a resident of Kenosh'a, in the county of Kenosha and State of Wisconsin, have invented certain new and useful Improvements in Carbu reters, of which the following is a specifica- .tion.

My invention relates to carbureters, and among the important objects are to provide improved adjustment mechanism for efficiently regulating for relative proportions of air and oil; to provide adjusting mechanism of this nature'which can'be'readily and accurately controlled from the drivers seat where the carbu-reter is used on a power driven vehicle; to obtain eflicient results with a minimum number of light and simple parts; and in general to provide an improved type of carbureter which is of simple and inexpensive contruct'ion-and which has a wide range of efficient utility in connection with either stationary or orta-ble engines.

In the accom anying drawings the various features the invention are clearly illustrated, and inthese drawings- Figure l is a side elevational' view of the carburetor with parts broken away, 2 is a vertical diametrical sectional view showing the normal positions of the parts, Fig. 3 is a similar sectional view but showing the adjustment for starting, Fig. 4- is a secti'onal view on plane 4-4, Fig. 3, and Fig. 5 is a sectional view on plane 5- 5, Fig. 1.

The body of the carbureter is cylindrical and cup-shaped and has the top flange 11 by means of which it ma be secured to an inlet pipe or manifold. he upper part of the body part forms a mixing chamber 12 from which outlet is controlled by a butterfly valve 13 of usual construction mounted on a shaft 14 from which the actuating lever 15 extends. The shaft also carries a hub 16 from which extend abutment wings 17 and 18, the abutment wing 17 being shown as provided withan abutment screw 19. By adjusting the screw 19 the degree of closure of the valve may be regulated.

The lower ut ':f the body 10 forms a pocket for the iston air valve 20 which is also cup-shop, and freely slidable in the body 10 but-sufilcie'nfl'y tightto prevent heal:- a between its walls and the body walls.

ear bottom wall 21 the air valve has a belt of air passageways or ports 22 and the a bumen of man man.

Application filed March 23, 1914. serial m1. 828,484.

Patented May 55, 1915.

body 10 has a belt of air inlet ports 23. When the air valve is down the ports are separated and out of register but after the valve has been raised a distance these ports will begin to register and the area of air inlet to the bodthe distance 1; raising being effected by the suction of the running engine.

At the lower part of the body part 10 is the internally threaded tubular extension 24 for receiving a threaded sleeve or barrel 25 provided at its lower end with a knurled head 26 by means of which the sleeve orm readily be turned to be adjusted vertically with reference to the extension 24, a look nut 26 serving to secure the barrel in adjusted position. Slidable in this sleeve or barrel is a stem 27 having the central passageway 28 for gasolene or other fuel delivered through suitable piping 29 and a fit ting 30'into which fitting the lower end of the stem 27 threads. The head 26 has the opening 31 through which the stem 27 extends and at the upper end of the stem is the lateral annular flange 32 between which and the head 26 is interposed a spiral compression spring 33 which tends to force the stem upwardly in the sleeve 25. Extending upwardly from the flange 32 is a cylindrical nozzle 34 in which is reciprocable the body of needle valve 35, this valve at its top havin a transverse notch 36 for receiving the ro' 37 extending diametrically across and supported on the air valve 20. The base of the nozzle is expanded to'form valve chamber 34 and conical wall section 34". T lower end of the body part of the he [To valve is tapered as indicated at 38 and from the end of this taper the needle oint 39 extends downwardly and into the b sageway 28 of the stem 27, the upper edge 40 around this passageway forming a seat for the tapered end 38. The body of the valve 35 has longitudinal grooves 41 for the passage of air and gasolene. Through the wall of valve chamber 34 and just above the flange 32 are air inlet openings 42. The bottom 21 of the air valve has the o ening 43 for receivin the nozzle base an through the base of. e body 10 around the extension 24 are air inlets 44.

The .air valve 20 is suspended from the fhel valve '35 by means of engagement of the shaft 37 .in the slot 36 and the weight part will then depend upon at the valve is raised, such ore or pasioo position and so that when the lever l5 is restored to normal position the abutment 61 will cooperate with the arm 57 to restore the valve 50 to open position, the valve 50 being normally fully open. With this arrangement if it is desired to restrict or shut oil the air supply to feed highly carbureted air to the engine the wire 49 \is pulled to effect either part or full closure of the valve 50 and to swing lever to effect separation of the main air ports '22 and 23 as before described. When valve is in closed position the air supply is practically shut off, there being of course a slight supply due to leakage past the valve,-and a-rich mixture will be delivered to the engine. When the engine is started the parts are gradually shifted back toward normal position whereupon the carburetor will operate normally.

In order to further increase the elliciency the air supply may be heated by connecting the neck 54" with a stove or drum surrounding the exhaust pipe from the engine or by connecting the neck with any other air heating source.

A carburetor involving the above features may be constructed at comparatively little expense and may be made very light. The

body 10 with its flange 11 may be stamped integral from sheet metal and likewise the piston valve may be formed integral of sheet metal. A minimum number of parts is emploved and these are all of very simple construction, and the arrangement is also so simple that there is very little chance for derangement or loss of adjustment. No oil reservoir or float chamber is necessary which further greatly simplifies the operation. Only two adjustment devices need be provided for the operator, namely, one for effecting adjustment of the throttle valve 15 and another for shifting the wire 4!) to simultaneously eli'ect adjustment of the nozzle structure and the air valve 50. I do not,

however, desire to be limited to the precise construction and arrangement shown as changes and modifications can no doubt be made which would still come within the scope of the invention, and

I claim as follows: 1. In a carburetor, the combination of a cup-shaped body part having a band of radial air inlets, a nozzle structure extending upwardly through the base of the body part and having a valve chamber, a fuel valve reciprocable in said nozzle to operate'with said seat to control the ilow of oil, a cup-shaped air valve reciprocable within said body part and suspended from said needle valve, the weight of said air valve tending to, keep the fuel valve againstits seat and suction ell'ect tending to raise the air valve to withdraw the fuel valve from its scat, air ports in said air valve normally out of register with the body part air inlets dial air inlets, a nozzle structure extending upwardly through: the base of the body part and into the'body part, said nozzle structure just above the base of the body part being expanded to form a valve cham her, the base of the body part having air inlets and the valve chamber having air inlets, a fuel valve reciprocablein said nozzle structure to seat in said valve chamber, a cup-shaped air valve reciprocable in the body part and secured to the upper end of the fuel valve, the weight of saidair valve tending to hold the fuel valve against its seat, said air valve having a band of radial air ports normali y below the body partair passageways, the base of said air valve having an opening to receive the nozzlc'structure and being normally directly above the valve chamber air inlets whereby when the air valve is raised by suction ell'ect air will flow primarily through the air passageways in the base of the body part and into the valve chamber through the valve chamber air inlets and then through the nozzle, further raising of the air valve causing the air valve ports and the body part ports'to register to admit additional air.

3. In a carburetor, the cmnbination oil' a cylindrical (mp-shaped body part having a band of radial air. inlets,'a nozzle structure mounted in the base of the body part to be vertically,rcciprocable with reference to the body part, said nozzle structure having a valve seat, a fuel valve reciprm'ablc in said nozzle structure to cooperate with said seat to control the low of fuel, a i upshapcd air valve reciprocable in said bod;- part and secured to the upper end at the loci valve, said air valve tending to hold the fuel valve against its seat and subject to suction effect to be raised to withdraw Iluxluel valve from its seat, said air valve ha\ ing a hand of radial air passag uvays nm'uially out oi. register with the body part air'iulets.

i. In a carburetor, the combination of a cylindrical body part havura a zone of radial air inlets, a nozzle extending through inlets, and means controllable from a distance for effecting vertical bodily shift of the nozzle whereby the 'fucl-va'lve and air valve suspended therefrom areeorrespondextendingiupwardly into the body part,- seidnozzle' having a valveseat, e fuel valve reciprocable'in said nozzle'tocoiperate with .saidseat to control the flow'ot fuel, a eylin-v tl ricz l air valve reciprocable in the body part and suspended from the top of the fuel valve, said air valve tending to hold the fuel valve to its seat and subject to suction eflect 1 to raise the fuel valve from its seat, said air valve having a belt of air passageways normally below the body part airinlets, and

means controllable from a distance for effeeting vertical shift of the nozzle. and the fuel valve and air valve carried thereby whereby to adjust the normal distance bepart and suspended tween the ai'fva'lve pasageways and the body part air inlets. I

6. In a carbureter, the combination of 'a cylindrical body part having a belt of air inlets and having a tubular extension from its ba s-e5 a barrel. vertically adjustable in said extension, a nozzle Within said barrel and extending upwardly into the body part, saidnozzlethaving a valve seat, a fuel valve re 'irocable in said nozzle to cooperate with said seat to control the flow of fuel a cylindric'el air valve reciprocable in the bodyt'roin the top of the fuel valve, said air val e tending to hold the fuel valve to its seat and subject to suction effect to raise the fuel valve from its seat, said air valve having a belt of air passageways normally below the body part air inlets, and

lever mechanism controllable from a distance to effect bodily depression of the nozzle together With the fuel valve and air valve carried thereby whereby to increase the normal distance between the air valve air passageways and the body part air inlets- 7. In a carbureter, the combination of a cylindrical body part, a nozzle extending: upwardly into the body part from the base thereof. the lower part of the nozzle being expanded to form a valve chamber and aconical wall section. a fuel valve reciprocabie in the nozzle to -oiipcrate with the valve seat to control the flow of fuel, air inlets in the walls of the valve chamber and air inlets through the base of the body part. a cup-shaped air valve reciprocable in the bodv part and having an opening at its base to receive the nozzle. said opening being normally in line with the lower edge of the conical vall section whereby air entering through the body part ai inlets 'vill be deflected by the base of the air valve into'the thence through the nozzle, suction effect on the air valvecausing' raising thereof and t having a belt of air tfibularfextension iironr the exterior of the nozzle.

g-cylindrical' body part, a nozzle extending valve seat to control the flow of fuel, air

said sent to control the flow of fuel a c v body part having a belt of air inlets, a fuel valve chamber through its air inlets and increase of the gap between the air valve and the conical wall section whereby air wilhfloiv in increasing quentities through the air valve base opening. and alongside 8. In a'caibureter, the eombinationof a upwardly into the body part from the base thercofl the lo er part of the nozzle being expanded to form a valve chamber and 'a conical Wall section, :i fuel valve reciprocable in the nozzle to coiiperate with the inlets in the walls'of the valve chamber and air inlets through the base of the body part, a cupshaped air valve reciprocable in the body part and having an opening at its base to receive the nozzle, said opening being normally in line with the lower edge of the conical wall section whereby air entering through the body part air inlets will be defiected by the base of the air valvev into the valve chamber through its air inlets and thencethrough the nozzle, suction effect on; the'air valve causing raising thereof and increase of the gap between the air valve and the conical vvall. section whereby air will flow in increasing quantities through the air valve base opening and alongside the exterior of the nozzle, said body part having a belt "of main air inlets and said air valve having a belt of air passageways nor-- mally below the body part air inlets but adapted to register therewith after said air valve has been raised a predetermined distance. U

9. In a carburetor, the combination of a bod y part having abelt of air inlets, a fuel nozzle extending through the base of and into the bodv part, said nozzle having a valve seat at its lower end, a fuel valve reciprocable in said nozzle to cotiperate with linrlrical air valve reciprocable in said body part and suspended from the upper end of said fuel valve. said air valve tending to hold the fuel valve to its seat and responding to suction to raise the fuel valve from its scat, said air valve having a belt of air pasv sagevvavs normally below the air inlets of the body part, a main air valve for con trolling the flow of air to said body: part inlets, and means for simultaneouslyefi'ecting adjustment of said main air valve and bodily vertical adjustment of said-nozzle to gage the normal distance between the body part air inlets and the air valve passageways. i

10. In a carburetor, the combination of a nozzle extending through the base of and into the body part, said nozzle having a valve seat at its lower end, a fuel valve reeiprocable in said nozzle to cooperate with saicl. seat to control the flow of fuel, a cylindrical air valve reciprocable on said body part and suspended from the upper end of said "fuel valve, said air valve tending to hold the fuel valve on its seat, said air valve having a belt of air passageways normally below the air inlets of the body part, a main air valve for controlling the flow of air to said body part inlets, lever mechanism connected with said nozzle for effecting bodily vertical adjustment thereof to gage the n0r- CHARLES B. KENT.

Witnesses:

O. N. YULE, F. G. RENNIE. 

